Projection device

Abstract

A projection device includes a housing and a bracket assembly. The housing has a first side wall and a second side wall connected to each other, the first side wall has a connecting portion and a limit groove, the limit groove has a curved section and a linear section connected to each other. The second side wall has a projection hole. The bracket assembly includes an adapter and a bracket. The adapter is movably connected to the connecting portion. The bracket is pivotally connected to the adapter and has a limit post extending into the limit groove. When the limit post moves to the linear section, the adapter is adapted to move in the connecting portion and drives the limit post to move in the linear section, so the bracket can be closer to the projection hole and the effect of covering the projection hole by the bracket is improved.

What is claimed is: 
     
         1 . A projection device, comprising:
 a housing, having a first side wall and a second side wall connected to each other, wherein the first side wall has a connecting portion and a limit groove, the limit groove has a curved section and a linear section, the curved section extends around the connecting portion, the linear section is connected to the curved section, the second side wall has a projection hole, and an extension direction of the linear section is substantially parallel to a central axis of the projection hole; and   a bracket assembly, comprising:   an adapter, movably connected to the connecting portion; and   a bracket, pivotally connected to the adapter and having a limit post that extends into the limit groove,   wherein when the bracket rotates relative to the adapter, the limit post moves in the curved section, and   wherein when the limit post moves to the linear section, the adapter is adapted to move in the connecting portion and the limit post is configured to move in the linear section when the adapter is moved.   
     
     
         2 . The projection device according to  claim 1 , wherein the bracket has a connecting section and a base connected to each other, the connecting section is pivotally connected to the adapter, when the limit post moves to the linear section, the base covers the projection hole, and when the limit post moves in the linear section in a direction away from the curved section, the base moves in a direction close to the projection hole. 
     
     
         3 . The projection device according to  claim 2 , wherein the housing further has a third side wall opposite the second side wall, and when the limit post moves to one end, away from the linear section, of the curved section, the base is adjacent to the third side wall. 
     
     
         4 . The projection device according to  claim 1 , wherein a first gear structure is provided on one side, facing the adapter, of the bracket, the adapter has a second gear structure that matches with the first gear structure, and the first gear structure is meshed with the second gear structure, so that the bracket is pivotally connected to the adapter. 
     
     
         5 . The projection device according to  claim 4 , wherein the adapter has an opening, the second gear structure is arranged on a hole wall of the opening, and the first gear structure extends into the opening. 
     
     
         6 . The projection device according to  claim 1 , wherein a limit structure is provided on one side, facing the housing, of the adapter, the limit structure has two planes parallel to each other, the connecting portion of the housing has a connecting hole, the connecting hole has two limit walls parallel to each other, the adapter is bonded to the connecting hole, and the two planes are opposite to the two limit walls, respectively, so that the adapter is adapted to move along a predetermined direction. 
     
     
         7 . The projection device according to  claim 6 , wherein a length of the two limit walls in the predetermined direction is greater than a length of the two planes in the predetermined direction. 
     
     
         8 . The projection device according to  claim 1 , wherein a limit bulge is provided in the limit groove, and the limit bulge is located at a junction of the linear section and the curved section. 
     
     
         9 . The projection device according to  claim 1 , wherein a limit bulge is arranged at a tail end, away from the curved section, of the linear section, and the limit bulge is adapted to clamp and fix the limit post between the tail end and the limit bulge. 
     
     
         10 . The projection device according to  claim 1 , further comprising a first fastener and a second fastener, wherein the first fastener has a shaft portion, and the shaft portion penetrates through the bracket, the adapter, and the first side wall, and is combined with the second fastener, so that the bracket assembly is fastened to the first side wall.